Real Trojan or False Positive?

Today I went to site, www . imagecave . com twice and each time Zone Alarm detected a suspected virus stored under \Documents and Settings\Administrator\LocalSettings\Temporary Internet Files\Content.IE5\8QHZS9J1\y[1].js. It was identified as Trojan-Downloader.JS.lframe.bwj.

I first quarantined it and then deleted it since it was not connected to any important file.